Ever since Jenelle Evans announced she was expecting baby number two with boyfriend Nathan Griffith, there have been a ton of questions for the Teen Mom 2 star. Was this pregnancy an accident? Was it planned? And why, exactly, is Jenelle having another baby when she still doesn't have custody of son Jace?

Well, the cat is out of the bag! In exclusive clip from tomorrow night's episode of Teen Mom 2, that The Stir has obtained from MTV, Jenelle and Nathan break some major news to her mom, Barbara Evans.

Did you catch the look on Barbara's face? She's not exactly known for holding back (who can forget "I hope ya have fun livin’ in the street with ya booooooyfriend!?"), but man, did it look like she was struggling to stay calm there, didn't it? I give her kudos for keeping it together -- if she did deliver a zinger to Jenelle with that whole "I'm the only mother Jace has ever known" comment.

What's really amazing, though, is how normal Nathan seems to be ... and how committed. He really seems to think babymaking with a girl who doesn't have custody of baby number one is a fabulous idea. I'm curious to see if they share more of their plans tomorrow night on Teen Mom 2!

Are you surprised to see Nathan and Jenelle planning the baby the way normal couples do?